Stereographic view of a horse-drawn carriage in the center foreground on a dirt road below Mule Shoe Curve near Veta Pass in Colorado. A railroad track of the Denver & Rio Grande Railroad runs along the curve in the background.

View of narrow gauge Denver and Rio Grande tracks near a breccia rock formation at what is identified as "Phantom Curve" in Conejos County, Colorado. Shows snow on the hillside next to a railroad grade.

Panoramic, aerial view of a Denver & Rio Grande Railway Company tracks at what is identified as "phantom curve" in Conejos County, Colorado. Shows railroad grades on hillsides, patches of snow, trees and rock formations. Probably a passenger rail...

A man stands and poses beside a pillar rock formation and Denver and Rio Grande Railway Company tracks on Phantom Curve in Conejos County, Colorado. Shows trees, a railroad grade, snow, and smoke above a train on the ridge in the distance.

Stereographic view of two short trains of the Denver & Rio Grande Railroad on Mule Shoe Curve at Veta Pass in Colorado. Several men sit on the locomotive and car in the foreground. Another man stands next to the train in the background at the base...

View of the curve station along the Amethyst mine tramway in Weaver, near Creede (Mineral County), Colorado. The curve station is an arched wood plank structure on stilts. Men sit on the tramway wires.

Stereographic view of rail ties in a small pile next to a portion of railroad track of the Denver & Rio Grande Railroad at Mule Shoe Curve on Veta Pass in Colorado. Shrubs and branches are in the foreground. A group of pine trees is in the...

View of a railroad curve identified as Phantom Curve just north of the New Mexico border in Conejos County, Colorado. Shows the narrow gauge tracks of the Denver and Rio Grande railroad, rock formations, snow and trees.

View of a railroad curve identified as Phantom Curve in Conejos County, Colorado. Shows rock formations near the narrow gauge tracks of the Denver and Rio Grande Railroad; a group of well-dressed women and men from an excursion train stand in the...

Stereographic view of rail ties in a small pile next to a portion of railroad track of the Denver & Rio Grande Railroad at Mule Shoe Curve on Veta Pass in Colorado. Shrubs and branches are in the foreground. A group of pine trees is in the...

Residences line an inclined dirt road near a hair-pin curve in Central City, Colorado. Wooden steps are built at the curve to help pedestrians up and down. A log retaining wall maintains the integrity of the upper portion of road.

In a view taken from above, twenty-nine Tenth Mountain Division soldiers march around a curve in a road towards a bridge over a small creek. A covered truck is begining its crossing as a soldier driving a camuflaged weasle (a treaded mitlitary...

Stereographic view of two short trains of the Denver & Rio Grande Railroad on Mule Shoe Curve at Veta Pass in Colorado. Several men sit on the locomotive and car in the foreground. Another man stands next to the train in the background at the base...

Denver and Rio Grande Western locomotive 278 (2-8-0), with a consist of gondola and freight cars, vents smoke on a curve in Gunnison County, Colorado. Shows the Gunnison River, a parked sedan and station wagon, hills, bluffs and rock formations.

View of a curve on the Denver and Rio Grande line known as Mule Shoe Curve on Veta Pass (La Veta Pass) in Huerfano County, Colorado. A steam engine, flat cars and freight cars are on the railroad tracks. Shows a man near a canvas tent, the stone...

View of the horizon and a mountain ridge and Denver and Rio Grande Railroad Company tracks near a wall of rock identified as the Portals on Phantom Curve, Conejos County, Colorado. A man lies on the ground by the tracks. Shows trees, rock...

View of well-dressed men and women passengers near the tracks at Phantom Curve, Conejos County, Colorado. Shows many dramatic pillar rock formations, a Denver and Rio Grande locomotive is in the distance.

Men stand and pose beside a Denver, South Park and Pacific Railroad engine, and on box-cars on a rocky slope near Alpine Station in Gunnison County, Colorado. Train cars read: "Tiffany", "D.S.P.& P.R.R.", "Summer & Winter, Refrigerator" and "Car...

Men and women stand on and near Denver and Rio Grande Railroad Company tracks near an area identified as Phantom Curve in Conejos County, Colorado. Rock formations are nearby. An excursion train is in the distance.

Tracks of the Denver and South Park Railroad, Douglas County, Colorado, follow a tight curve on the South Platte River. A trestle traverses the water in one place; crags rise on all sides. A tent is pitched between the rails and a footbridge.

View of tracks of the Denver and Rio Grande Railroad Company on Phantom Curve in Conejos County, Colorado; a man stands near a pillar rock formation. Shows trees, the track bed, snow, and a train on the ridge in the distance.